Locks – What parts have to be oiled
How to lubricate entry doors and what to use : Locks What Parts Have To Be Oiled
Quote from Article entitled How to lubricate entry doors and what to use:
In general, many modern locking-mechanisms rarely need to be oiled. But if the door lock does need some maintenance, you should use only special compounds, since badly-chosen products can eventually make the mechanism inoperable. In any case, everything that is required for maintaining a lock should be noted in the instructions.
The full version of the article can be found here.